Financial Services

How a Regional Bank Cut Security Incident Response Time by 53%

53%
Faster security incident response after a zero-downtime cloud migration
Client
Meridian Financial Group
Industry
Financial Services
Region
United States
Services Engaged
Cybersecurity Services, Cloud Infrastructure & DevOps Services
The Challenge

End-of-Life Infrastructure,
Manual Compliance, Slow Response

Meridian Financial Group’s core banking systems ran on on-premises infrastructure
approaching end of vendor support, with no clear migration plan because the systems handled regulated financial data and couldn’t tolerate downtime. Security monitoring was split across disconnected tools, so a genuine incident could take hours just to confirm before response even started.

Compliance reporting was largely manual: pulling logs from multiple systems, cross-referencing them by hand, and assembling audit documentation that took the security team roughly
three weeks to prepare for each quarterly review. The infrastructure worked, but every part of it, from monitoring to reporting to the hardware itself, was aging in the same direction at once.

Objectives

What Success Needed to Look Like

  • Migrate core systems to secure cloud infrastructure with zero unplanned downtime
  • Centralize security monitoring for faster incident detection and response
  • Automate compliance reporting instead of manual quarterly log assembly
  • Reduce ongoing infrastructure costs without reducing security posture
The Solution

A Migration Planned Around Never Going Down

DSG migrated Meridian’s core banking infrastructure to a secure, compliance-configured
cloud environment using a phased, workload-by-workload approach specifically designed to avoid any
customer-facing downtime during the transition. Centralized security monitoring replaced the previous patchwork of disconnected tools, giving the security team one place to detect and triage incidents
instead of several.

Cybersecurity Services led the security architecture, monitoring setup, and compliance
automation; Cloud Infrastructure & DevOps Services led the migration itself, including the
zero-downtime cutover plan for each core system. Automated compliance reporting now generates in hours what used to take the security team three weeks to assemble by hand.

Process

How the Engagement Unfolded

1

Security & Infra Audit

Mapped every system and dependency

2

Migration Design

Zero-downtime cutover plan per workload

3

Monitoring Build

Centralized security operations setup

4

Phased Migration

Workload-by-workload cutover

5

Compliance Automation

Automated reporting live

Technologies Used

The Stack Behind the Migration

AWS
Terraform
Datadog
SOC Tooling
Timeline

18 Weeks, Start to Full Cutover

W1–3

Audit

W4–6

Migration Design

W7–10

Monitoring Build

W11–16

Phased Migration

W17–18

Compliance Automation

The Difference

Before vs. After

Before

Avg. incident response time 4.5 hrs
Compliance report prep ~3 weeks
Security monitoring 4 disconnected tools
Infrastructure spend Baseline

After

Avg. incident response time 2.1 hrs
Compliance report prep ~3 days
Security monitoring 1 centralized platform
Infrastructure spend 31% lower
Results

The Numbers

53%

Faster incident response

31%

Lower infrastructure costs

99.98%

Uptime since migration

0%

Minutes of unplanned downtime during migration

"Migrating core banking systems with zero downtime sounded optimistic when DSG first proposed it. They planned every cutover down to the workload level, and it went exactly as planned. Our incident response is a different function now."

Chief Information Security Officer, Meridian Financial Group
Gallery

The Platform in Action

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